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Device and method for transmitting data

a technology of transmitting device and data, applied in the direction of transmission/receiver shaping network, modulated carrier system, power amplifier, etc., can solve the problems of increasing the cost of a respective filter, and the method practically cannot be realized, so as to reduce and the interference between signals transmitted in different transmission or communication channels

Active Publication Date: 2018-12-25
UNIVET DER BUNDESWEHR MUENCHEN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This patent is about a method for transmitting data using frequency multiplexing, and reducing interference between signals transmitted in different channels. The invention suggests using a filter upstream of a power amplifier to reduce interference, but this method may not be effective when using high-speed signals with a constant envelope waveform. The invention focuses on eliminating undesired frequency components downstream of the amplifier, allowing for the use of more efficient amplifiers with high non-linear distortions and a larger efficiency. The compensation method is cost-effective and does not transmit undesired spectral components. The invention also provides an adaptive modification of the compensation signal based on the comparison between the transmission signal and the compensation signal or filtered signal, making it easier to effectively compensate for changing signal parameters.

Problems solved by technology

However, this method practically cannot be realized due to the large ratio of the carrier frequency to the band width of the transmission channel in state of the art radio communication systems.
This cannot be easily achieved in case of a large ratio of the carrier frequency to the channel band width, which increases the costs of a respective filter.

Method used

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  • Device and method for transmitting data
  • Device and method for transmitting data
  • Device and method for transmitting data

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Embodiment Construction

[0038]FIG. 1 shows a data transmission device 1 for the transmission of data. Along a transmission path 2 data ak of an alphabet A, for example a binary alphabet Aϵ{−1, +1}, are received at a modulator 4. The modulator 4 on the basis of the received data ak generates, for example according to a continuous phase modulation method (CPM), a modulated carrier signal s(t). The modulated carrier signal s(t) along the transmission path 2 after a specific delay time τH is amplified in a power amplifier 5 with α factor β, thereby receiving a change in phase ϕP and another delay time τP. Accordingly, the output signal of the power amplifier 5 or transmission signal p(t) respectively, is given as:

p(t)=β·ejφP·s(t−τH−τP)

[0039]A transmitter 6, for example an antenna 7, is implemented for transmitting the transmission signal p(t). The transmission signal p(t) comprises frequency components within the used transmission channel and also undesired frequency components outside the used channel, which ...

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Abstract

A method for transmitting data, wherein along a transmission path: (i) a modulated carrier signal is generated based on the data to be transmitted, the carrier signal having a carrier frequency within a given transmission channel, which is comprised of a number of frequencies, and (ii) the modulated carrier signal is amplified to a transmission signal, wherein along a compensation path: (i) the modulated carrier signal is filtered, whereby the frequency components within the transmission channel are removed, and at least one of a phase, an amplitude, and / or a delay of the filtered signal is modified thereby generating a compensation signal, and wherein the compensation signal is subtracted from the transmission signal thereby generating a compensated transmission signal, and wherein the compensated transmission signal is transmitted. Also a respective data transmission device is disclosed.

Description

[0001]This nonprovisional application is a continuation of International Application No. PCT / EP2016 / 052316, which was filed on Feb. 3, 2016, and which claims priority to European Patent Application No. 15 155 267.6, which was filed in Europe on Feb. 16, 2015, and which are both herein incorporated by reference.BACKGROUND OF THE INVENTIONField of the Invention[0002]The present invention relates to a method for transmitting data, wherein along a transmission path a modulated carrier signal is generated based on the data to be transmitted, wherein the carrier signal has a carrier frequency within a given transmission channel, which is comprised of a number of frequencies, and wherein the modulated carrier signal is amplified to a transmission signal. The invention further relates to a data transmission device comprising along a transmission path a modulator, an amplifier and a transmitter for transmitting a transmission signal provided according to the prescribed method.Description of ...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): H04K1/02H03F3/24H04L27/04H04L25/03H04L25/49H04L27/36H03F1/32H04B1/04H04L27/12H04L27/20
CPCH04L27/366H03F1/32H03F1/3223H03F3/24H03F3/245H04L27/04H04L27/12H04L27/2003H04L27/368H04B1/0475H04B2001/0408
Inventor LANKL, BERTHOLD
Owner UNIVET DER BUNDESWEHR MUENCHEN
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